Adistance of 150 km was covered by a motorcyclist traveling at an average speed of 75 km/h, by a bus at 60 km/h, a truck at 50 km/h, and a bicyclist at 20 km/h. how much time did each require to travel the entire distance? explain why the speed and the time needed to travel 150 km are inversely proportional quantities. find the time in hours needed to travel for motorcyclist, bus, truck and bicylclist